CN206036428U - Long -effective anti -corrosion loses inside lining formula prestressing force steel cylinder concrete pipe - Google Patents

Abstract

The utility model discloses a long -effective anti -corrosion loses inside lining formula prestressing force steel cylinder concrete pipe adopts high deformability's ultra high performance concrete bonding to cover and protect steel cylinder, prestressed wire, bellmouth steel loop and the not corrosion of socket steel loop to be used for the protection of concrete inside lining. The utility model discloses the ultra high performance concrete who uses possesses excellent physics mechanical properties, including high deformation and high crack resistance, high tensile strength, high adhesion strength, high tenacity to and high impervious performance, highly resistance chemical attack performance and highly resistance freezing and thawing - - - super high durability, can provide reliable, the long lasting corrosion protection of preventing for inside lining formula prestressing force steel cylinder concrete pipe, increase substantially the durability and the operational reliability of this type of pipeline, guarantee and realization long working life (75~100 year) desirable to this type of tubular product pipe laying.

Description

Long life anti corrosion lined Prestressed concrete cylinder pipe

Technical field

This utility model is related to long life anti corrosion lined Prestressed concrete cylinder pipe, in particular by high deformability Ultra-high performance concrete, in corrosive atmosphere in protective conduit the long-term not corrosion of steel and protect concrete lining from Corrosion in water.

Background technology

Prestressed concrete cylinder pipe（Prestressed Concrete Cylinder Pipe, abbreviation PCCP）It is a kind of Water transferring line, originates from France, and America and Europe started development, the eighties and started to develop and apply in China the forties in last century.

PCCP is to wind compressor wire by the high-strength concrete tube core with steel cylinder, then is sprayed with cement mortar protective course and structure Into；It is welded together with steel bell and spigot and steel cylinder, slidingtype flexible joint is formed by the groove on bell and spigot and cushion rubber.PCCP is pressed Structure（Position of the steel cylinder in tube core）It is divided into lined Prestressed concrete cylinder pipe（Abbreviation PCCPL）With embed-type prestressing force Cylinder concrete pipe（Abbreviation PCCPE）.Then PCCPL winds ring outside thin steel cylinder using thin steel cylinder inner lining concrete as tube core To compressor wire and mortar cover is made, be suitable for the pipeline of bore DN400～1200mm.PCCPE is embedding with thin steel cylinder In pipe of concrete in-core, ring orientation prestress steel wire is then wound outside concrete tube core and mortar cover is made, is suitable for mouth The pipeline of footpath DN1400～4000mm.This utility model is directed to lined Prestressed concrete cylinder pipe（PCCPL）.

PCCP is the compound tubing that steel plate, concrete, high tensile steel wire and cement mortar different materials are combined, and is had Steel and the respective characteristic of concrete, including can bear external pressure in height, rigidity it is big, it is impervious it is strong, seal tight, easy for installation, anti- Shock stability is good, the low feature of operation and maintenance cost, thus long distance water transfer main at home and abroad, urban water supply and industry have Pressure water（Including general power plant, nuclear power station）, pressure inverted-siphon, sewage pressure main, submarine pipeline（Clean water or saline）, overflow It is widely adopted in the engineerings such as flow tube.For large-scale water transmission pipeline, compared with steel pipe, ductile iron pipe, advantage is system to PCCP Low cost is made, and anticorrosive and maintenance cost is low.

The U.S. once assessed, and the service life of PCCP was in 75～100 years.However, application is so far, the durability of PCCP and can Increasingly be under suspicion by property.Famous " the big race in the Africa " engineering built the eighties in last century, has sent out during by 2005 Raw 5 PCCP explosions；Through detection, oneself is it is found that steel wire fracture 3500, is badly in need of carrying out positive rehabilitation plan part pipeline. Present this engineering, thousands of section PCCP pipeline sections need repairing or change, and remaining pipeline needs to carry out state estimation.Last century 90 Since age, the U.S. has a plurality of PCCP pipelines that booster event occurs, and reduces people to PCCP durability and the letter of service life The heart." PCCP manages the calamity of very high failure likelihood and failure, and reproduction PCCP is not managed now to have caused the U.S. ".In State also there occurs a lot of PCCP pipeline bursts events in recent years, and most bob gives birth to the PCCP pipelines of booster, and the time for putting into effect is only There are 3～5 years.Additionally, the detection carried out to running pipeline finds that compressor wire " fracture of wire " is PCCP Common Diseases and hidden danger.

Investigation to all booster events shows that compressor wire corrosion is broken, and makes PCCP bear intrinsic pressure ability big Amplitude reduction, is the immediate cause that booster occurs.Wire quality difference and（Or）Then compressor wire becomes rusty for mortar cover failure Erosion, then be that steel wire is broken（Fracture of wire）Main cause.Problem has its source in, embed-type Prestressed concrete cylinder pipe standard gauge The mortar cover crack-resisting design of model, " deflection " of check method are it is assumed that have larger difference with reality." deflection " is false If viewpoint thinks, protective layer will be produced the microcrack that visually can not be seen by stretch higher than mortar tensile strength；And visible split 8 times for microcrack of seam deflection, now the virtual tension stress of protective layer is 8 times of mortar tensile strength.Standard regulation protection Slabbing stitches check method, using the deflection or virtual tension stress of suitable 6.4～8 times of cement mortar tensile strength, as long as interior The deflection or tension stress that outer load is produced assumes deflection or virtual tension stress less than this, and protective layer crack is just checked Can pass through.Such protective layer crack is checked and is performed practically no function, " PCCP standards specify, mortar cover be not allow for it is any can See crack, a variety of cracks of practical situation mortar cover are inevitable ".That is, PCCP pipes mortar cover cracking and Cannot effective protection compressor wire, be because that mortar deformation itself and anti-crack ability are not enough, and sand put up with the design of pipe Slurry performance, so that cause PCCP（PCCPE and PCCPL pipes）With the defect that congenital durability is not enough.The temperature difference it is big, be dried and Corrosive atmosphere, this defect be it is fatal, compressor wire can very fast corrosion, break and booster occur.This is also that the U.S. washes in a pan Eliminate the basic reason of PCCP.

The present invention exactly manages the root of this defect for PCCPL, there is provided reliable solution, extensive application value weight Greatly.China is producing and is using PCCPL, this heavy caliber pipe to be often used for large-scale water delivery or pressure drainage work at present in a large number Journey.These engineerings are projects of vital and lasting importance, do not allow booster or there is potential hidden danger；Once generation problem, the loss for bringing To be huge.People have also realised that the mortar cover for currently using cannot ensure the durability and safety of PCCPL Property, need relatively reliable technical scheme.

Technical solution of the present invention, using with high deformation and high anti-crack ability, high-tensile ultra-high performance concrete （UHPC）, ordinary mortar is substituted as the steel cylinder of PCCPL, steel wire and bell and spigot steel loop protective layer, can be inherently eliminated tradition Mortar cover deforms the defect not enough with cracking resistance；Meanwhile, using UHPC high bond strengths, high tenacity, high impact properties Energy, high permeability resistant energy and good corrosion resistance, can avoid mortar cover hollowing, easy damaged and corrosion resistance deficiency etc. from asking Topic.UHPC protective layers can provide protection reliably and with long-term for compressor wire and bell and spigot steel loop, significantly lift PCCPL's Durability and service life.Additionally, PCCPL has been also used for pressure sewage or corrosive liquid conveyance conduit, concrete lining can be received Service life is reduced to chemical attack.For such problem, the present invention makes UHPC protective layers protection PCCPL in inside pipe wall and mixes Solidifying soil liner.

Ultra-high performance concrete（Ultra-High Performance Concrete, abbreviation UHPC）, because need to typically mix Enter steel fibre or high-strength polymer fiber, also referred to as very-high performance fibre reinforced concrete（Ultra-High Performance Fibre Reinforced Concrete, abbreviation UHPFRC）.UHPC belongs to modern advanced material, innovation Cement-based material（Concrete or mortar）With fiber, steel（Reinforcing bar or high strength wire）Composite mode, significantly carry The high intensity utilization ratio of fiber and reinforcing bar in concrete, makes all round properties of cement-based material there occurs that great-leap-forward enters Step possesses strong superelevation, high tenacity and superelevation durability.

" the superelevation mechanical property " of UHPC is mainly reflected in superelevation tensile strength（Uniaxial tension and bending and tensile strength）With High tenacity, this is realized by short steel fibre is added.Tensile strength may be up to 30MPa, and energy to failure reaches 1,500 ~ 40,000 N/ m（Steel fibre volume content 2% ~ 12%）, make UHPC stride into the ranks of toughness, high-toughness material（Energy to failure is more than 1,000J/m²Draw It is divided into toughness material）.In terms of deformability, UHPC can realize the apparent of stretching in relatively low content of steel fiber level Elastic stage is experienced in " strain hardening " behavior, i.e. single shaft tension, many microcracks occurs, and fiber drawing-resistant function starts；Should with post-tensioning Power rises, into the stiff strain hardening stage（" surrender " of similar steel）；Reach maximum tension stress after cracking（Tension is strong Degree）, there are indivedual cracks in local expansion, tension decline afterwards, into softening stress-displacement stage.Steel fibre intensity obtains effective profit With, UHPC so as to obtaining very high cracking resistance and impact resistance.

Another performance of UHPC most captivations is potential superelevation durability.Theoretically and according to test so far Result of study, substantially can determine：UHPC does not have freeze-thaw cycle, alkali-aggregate reaction（AAR）And delayed ettringite formation （DEF）The problem of destruction；In uncracked condition, the anti-carbonation of UHPC, resisting chloride ion penetration intrusion, resisting erosion of sulfate, anti-chemistry are rotten The endurance quality index such as erosion, wear-resisting, with traditional high-strength high-performance concrete（HSC/HPC）Compare, have carrying for the order of magnitude or multiple It is high.UHPC has extraordinary microcrack self-healing ability.As water-cement ratio is very low, UHPC mixes and stirs the water yield and is only capable of supplying part of cement Aquation, the inside of most cement granules are in no hydrated state.Therefore, water or steam are exposed into the crack of UHPC Aquation " will be continued " in the unhydrated part of the cement granules of fracture faces；The hydrated product volume for combining outside moisture is more than Somehow volume, additional volume can cram crack to cement.Test and engineering verification show that the crack self-healing of UHPC can not only Enough closing microcrack reduces permeability and keeps good durability, while also play the effect of " cementing " crack, it is extensive to a certain extent The mechanical property that multiple concrete is reduced because of crack.

Ultra-high performance concrete used in the present invention（UHPC）, possess high deformation and high anti-crack ability, high-tensile, High tenacity, high impact resistance, high permeability resistant, high-durability and crack self-healing performance；With concrete and the interfacial adhesion of steel Intensity is also very high, is the anti-corrosion protection material of preferable PCCPL pipes；The protective layer made of which, working life is up to hundred More than year, it is long-effective corrosion etching method.

Classify from aggregate size, UHPC is also mortar or extraordinary mortar.UHPC can be prepared rheology is mixed and stirred with common height Strength mortar is similar to, and directly penetrates, sprays or smears slurry using existing weaponry and equipment roller and make protective layer；Protected using UHPC excellent hardening capacity Compressor wire, steel cylinder inside shield PCCPL, the steel such as bell and spigot steel loop, and concrete lining, be it is a kind of easily implement, can By, long-acting anti-corrosion method, the durability and working life of PCCPL can be significantly lifted.

The implementation of prior art

Prestressed concrete cylinder pipe（PCCPL）Generation premature failure or durability are bad, and main cause is the pre- of PCCPL Stress wire and steel cylinder corrosion；Also small part PCCPL initial failure is because quality of production defect, using unqualified, improper The steel of grade or kind, excessively using cathodic protection（Excessive extra current, may cause metal toughness or ductility because of liberation of hydrogen Reduce, i.e., " hydrogen embrittlement "）.Now, standard criterion, such as GB/T 19685-2005《Prestressed concrete cylinder pipe》, PCCP is produced Quality, clearly required using steel and mortar cover（Cracking resistance requires to have put up with the performance that mortar can reach）； GB 28725-2012《The cathodic protection in buried Prestressed concrete cylinder pipe road》Then specification, guidance and raising PCCPL anticorrosions Cathodic protection level.But, the mortar cover of PCCPL remains the weak link of its durability.Mortar cover itself Cracking is inevitable, and in transporting and hoisting process easy damaged, resisting chloride ion penetration is invaded and resistance to chemical attack is not enough.In the temperature difference Greatly, dry, drying and watering cycle and corrosive atmosphere（Soil or subsoil water are compared with generally existing sulfate, villaumite or sour corrosion）, with And under external and internal pressure effect, mortar is possible to serious cracking and very fast deterioration, loses the protection to compressor wire, steel cylinder etc. and makees With.Mortar cover fails, and the load of cathodic protection significantly will increase, or even uncontrollable compressor wire, steel cylinder corrosion Spread.

Requirement can be met for PCCPL mortar cover cracking resistances, corrosion resistance, and the anti-chemistry of concrete lining is rotten Erosion scarce capacity, also has some patents to propose Improving Measurements, wherein has：

·CN201220309638.X（There is the lined prestress steel cylinder concrete of fibre crack-resistance mortar cover on surface Pipe）：The utility model method mixes polypropylene fibre in relying on mortar and improves mortar cracking resistance.

·CN201210162978.9（Galvanizing is combined lined prestress steel cylinder concrete with epoxide coal bituminous anti-corrosion Pipe）、CN201210220592.9（The lined Prestressed concrete cylinder pipe of long-life multi-layer anticorrosion process）、 CN201310190348.7（A kind of inwall has the lined Prestressed concrete cylinder pipe of epoxy protective layer）、 CN201510603804.5（The lined Prestressed concrete cylinder pipe of full anti-corrosion direct drinking）、CN201510604002.6（It is long Life-span full antiseptical lined Prestressed concrete cylinder pipe）：These inventive methods, anticorrosive measure include steel cylinder and steel wire Zinc-plated, inner liner stainless steel steel cylinder or PVC, inwall coating epoxy coating, pipe outer wall coat bituminous epoxy coating, bellmouth steel loop and insert Mouth steel loop coating corrosion-inhibiting coating or zinc-aluminium rare earth coating, mortar cover admixture polypropylene fibre improve cracking resistance, etc., with And compound use these measures.

·CN201310187286.4（PCCP power plant cooling waters cylinder concrete pipe with anticorrosive coat and production method）：Should Inventive method while the last operation of whitewashing together that traditional PCCP pipelines are produced, using scraping device by the water after whitewashing Cement mortar surface strikes off, while cement mortar is applied and strikes off rear crude pipe surface by the device of the underflow of cementing of rear follow-up, The pressurization floating device cement mortar that applies pipe surface that follows up afterwards again afterwards after pipeline is parched completely, is managed while floating Method coating epoxy resin and winding glass fibre of the road surface using machinery, while scrape floating whole using mechanical means, it is to be coated Production tube is after the epoxy resin fiberglass protective layer solidification covered.

·CN201310187303.4（Prestressed concrete cylinder pipe with epoxy mortar protective layer and production method）：Should Inventive method while the last operation of whitewashing together that traditional PCCP pipelines are produced, using scraping device by the water after whitewashing Cement mortar surface strikes off, while the device of the coating epoxy resin of rear follow-up pipeline table crude after epoxy resin is applied and struck off Face, then epoxy mortar is coated by follow-up epoxy mortar coating unit and epoxy resin surface is simultaneously while pressurize floating afterwards.

·CN201310187328.4（Novel seepage PCCP Prestressed concrete cylinder pipes and production method）：The invented party Method while the last operation of whitewashing together that traditional PCCP pipelines are produced, using scraping device by the cement mortar after whitewashing Surface strikes off, while cement mortar is applied and strikes off rear crude pipe surface, then heel by the device of the underflow of cementing of rear follow-up The cement mortar that pipe surface is applied by the pressurization floating device for entering is while floating.

In said method, polypropylene fibre can only improve mortar hardening stage anti-crack ability, that is, prevent or reduce mortar modeling Property contraction fissure；Polypropylene fibre can not improve the cracking resistance of hardened mortar, because its elastic modelling quantity is too low, it is impossible to constrain The crack of hardened mortar；Additionally, the method does not improve the impervious and resistance to corrosion of mortar.Mortar cover surface-coated Mortar can be completely cut off by epoxy resin fiberglass anticorrosive coat, bituminous epoxy coating etc. with corrosive environment；Steel cylinder and wire galvanization, Bell and spigot steel loop coating anticorrosive paint etc., can delay the generation of corrosion.Can these anti-corrosion methods extensively be applied, depending on into Originally with antiseptic effect or cost performance.

The content of the invention

The purpose of this utility model is for lined Prestressed concrete cylinder pipe（PCCPL）There is provided a kind of reliable, long The anti-corrosion method of effect.

The technical solution of the utility model is：A kind of long life anti corrosion lined Prestressed concrete cylinder pipe, lined On the outside of Prestressed concrete cylinder pipe body and Pipe installing is followed by the exposed parts of cephalic groove channel-section steel material, including steel cylinder, in advance should Factory has been covered each by power steel wire, bellmouth steel loop and socket steel ring has made ultra-high performance concrete external protection and field fabrication The inside and outside protective layer of ultra-high performance concrete；The ultra-high performance concrete of factory's making is coated with the concrete lining inwall of pipe Inner protective layer.

Factory on the outside of steel cylinder and compressor wire makes ultra-high performance concrete external protection thickness for 20～50mm.

It is 15～30mm that ultra-high performance concrete inner protective layer thickness is made in the factory of the concrete lining inwall of pipe.

Field fabrication ultra-high performance concrete inner protective layer, bellmouth steel loop and socket steel ring are filled in pipe joint internal channel On exposed parts, bonding is coated with field fabrication ultra-high performance concrete inner protective layer.

Field fabrication ultra-high performance concrete external protection is irrigated and is filled in pipe joint outer channel, socket steel ring and is held On mouth steel loop exposed parts, bonding is coated with field fabrication ultra-high performance concrete external protection.

Implementation is as follows：

1st, prepare ultra-high performance concrete：Adhesive aggregation type mix is adapted to roller and penetrates, sprays or smear slurry equipment making protective layer；Pipe The ultra-high performance concrete mix that road is installed and used, is divided into adhesive aggregation type and self-compacting type concrete, and wherein self-compacting type concrete is used for outside joint The perfusion of channel bottom.The hardening capacity of ultra-high performance concrete（Standard curing 28 days）Reach：Comprcssive strength is more than or waits In 120MPa, elasticity tensile strength（Tension is split just）More than or equal to 6MPa, tensile strength（Ultimate tensile stress）More than or wait In 7MPa, ultimate tensile strength is more than or equal to 1.0 ‰.

2nd, in the production process of pipe, the factory for making 20～50mm thickness on the outside of steel cylinder and compressor wire makes superelevation Performance concrete external protection bonding is covered；The factory that 15～30mm thickness is made in concrete lining inwall makes very-high performance Concrete inner protective layer；Steam curing or room temperature moisture-keeping maintaining.

3rd, after Pipe installing is in place, adhesive aggregation type ultra-high performance concrete is filled in pipe joint internal channel, form scene system Make ultra-high performance concrete inner protective layer, complete bonding and cover bellmouth steel loop and socket steel ring exposed parts, room temperature moisture-keeping maintaining.

4th, ultra-high performance concrete mix is irrigated in pipe joint outer fissure trench bottom, joint outer channel side and top are filled out Adhesive aggregation type ultra-high performance concrete mix is filled, field fabrication ultra-high performance concrete external protection is formed, bonding is completed and is covered Socket steel ring and bellmouth steel loop exposed parts, room temperature moisture-keeping maintaining.

The utility model has the advantage of：It is similar with ordinary mortar that prepared UHPC mixes and stirs rheology, can be used directly Existing weaponry and equipment roller is penetrated, sprays or is smeared slurry and makes protective layer；Used ultra-high performance concrete（UHPC）Possesses excellent physical force Performance is learned, including high deformation and high anti-crack ability, high-tensile, high bond strength, high tenacity, high impact-resistance, and High permeability resistant energy, high resist chemical performance and high anti-freezing melt performance superelevation durability, are that lined pre-stress steel cylinder is mixed Solidifying soil pipe（PCCPL）Reliable, long-acting anti-corrosion protection is provided, the durability and reliability of this kind of pipeline is increased substantially, is protected The pipeline that barrier is laid using the tubing realizes desired long service live（75～100 years）.

This utility model then provides a kind of brand-new technical scheme, substitutes traditional mortar, the UHPC for being used with UHPC Possess excellent mechanical property and durability, compressor wire inside PCCPL, steel cylinder, bellmouth steel loop can be protected stably in a long term With socket steel ring not corrosion, and concrete protection liner is from chemical attack.

The easy implementation of the technical scheme and reliable sexual clorminance are embodied in：1st, can prepare UHPC mix and stir rheology with it is common Mortar is similar to, and is easy to directly be penetrated, spray or smeared external protection in slurry making using existing weaponry and equipment roller in factory, need not change existing Production technology；Meanwhile, self-compaction and adhesive aggregation type UHPC mix can be prepared in situ in Pipe installing, be easy to irrigate and fill pipe Road joint groove, bonding are covered and protect bellmouth steel loop and socket steel ring exposed parts.2nd, UHPC mixs have high cohesion, With good adherence of concrete, steel wire, steel cylinder and steel loop surface, plant protection layer make efficiency can be improved, and improves Pipe installing Field joint trench fill makes the efficiency of protective layer.3rd, UHPC and the interface between concrete, steel cylinder, steel wire and steel loop are hardened The interface binding intensity between concrete, steel that adhesion strength, significantly larger than normal concrete, mortar can reach, easily In avoiding the occurrence of the defects such as hollowing.4th, UHPC containing micro steel fiber used in the present invention, possess high deformation and high anti-crack ability, High-tensile and high impact-resistance, ensure that PCCPL protective layers in various mechanics loads（Pipeline transportation lifting collision, External and internal pressure is acted on）And environmental load（Drying and watering cycle, temperature change）Globality under effect.5th, UHPC have high solidity, High permeability resistant, good corrosion resistance and high anti-freezing melt performance, and UHPC is that durability is best in current all engineering materials in itself Material（In natural environment more than working life a century, Japanese specification thinks 100 years UHPC arrangement works life-spans）, therefore can be pre- Stress wire, steel cylinder and bell and spigot steel loop and concrete lining provide protection reliably and with long-term.6th, using UHPC protective layer skills Art scheme, corrodes in the face of salt-soda soil or ground water chemistry, it is no longer necessary to do corrosion-inhibiting coating, advantage of lower cost in pipe shaft.UHPC Protective layer is compatible with cathode protection technology, and cathodic protection can be used as standby measure.7th, UHPC protective layers good combination property, reliability Height, can be that PCCPL compressor wires, steel cylinder and bell and spigot steel loop and concrete lining provide long life anti corrosion protection, significantly Reduce pipeline performance maintenance and repair expense, the century-old engineering of achievement.8th, the present invention solves PCCPL protective layer crack-resisting designs, check The hypothesis of method and the inconsistent difficult problem of mortar material performance, eliminate the durability defect of PCCPL designs from root.

Description of the drawings

Fig. 1 is this utility model long life anti corrosion lined Prestressed concrete cylinder pipe structural representation.

1- steel cylinders；2- compressor wires；3- bellmouth steel loops；4- socket steel rings；5- factories are made outside ultra-high performance concrete Protective layer；6-1- field fabrication ultra-high performance concrete inner protective layers；6-2- field fabrication ultra-high performance concrete external protections； 7- concrete linings；8- rubber rings；9- factories make ultra-high performance concrete inner protective layer.

Specific embodiment

Lined Prestressed concrete cylinder pipe（PCCPL）Steel cylinder, compressor wire, part bellmouth steel loop and part socket The factory of steel loop makes ultra-high performance concrete external protection 5 and factory makes ultra-high performance concrete inner protective layer 9, in factory Complete.After Pipe installing is in place, the field fabrication very-high performance of joint bellmouth steel loop and socket steel ring exposed parts is mixed Solidifying soil inner protective layer 6-1 and field fabrication ultra-high performance concrete external protection 6-2, completes in Pipe installing field fabrication.Tool Body step is as follows：

1st, adhesive aggregation type ultra-high performance concrete is prepared in factory：The mix slump is mixed newly for 30 ~ 100mm, suitable machinery Roller is penetrated, sprays or is smeared slurry and makes protective layer.The hardening capacity of ultra-high performance concrete（Standard curing 28 days）Reach：Pressure resistance Degree is more than or equal to 120MPa（100mm cube of test specimen）, elasticity tensile strength is more than or equal to 6MPa（30mm thick plates test specimens）, Tensile strength is more than or equal to 7MPa, and ultimate tensile strength is more than or equal to 1.0 ‰.

2nd, factory's system of 20～50mm thickness in the production process of PCCPL, is made on the outside of steel cylinder 1 and compressor wire 2 Make ultra-high performance concrete external protection 5；The factory that 15～30mm thickness is made in 7 inwall of concrete lining makes very-high performance Concrete inner protective layer 9；Steam curing（90 DEG C of constant temperature 48 hours, heating-cooling speed are less than 15 DEG C/h）Or room temperature moisturizing is supported Shield at least 7 days.

3rd, at Pipe installing scene, self-compacting type concrete and adhesive aggregation type ultra-high performance concrete is prepared, wherein self-compacting type concrete is used for The perfusion of pipe joint outer fissure trench bottom.The hardening capacity of ultra-high performance concrete is required ibid.

4th, after Pipe installing is in place, adhesive aggregation type ultra-high performance concrete is filled in pipe joint internal channel, form scene system Make ultra-high performance concrete inner protective layer 6-1, complete bonding and cover bellmouth steel loop 3 and 4 exposed parts of socket steel ring, room temperature moisturizing Maintenance at least 7 days.

5th, self-compaction super performance concrete is irrigated in pipe joint outer fissure trench bottom, joint outer channel side and top are filled out Adhesive aggregation type ultra-high performance concrete mix is filled, field fabrication ultra-high performance concrete external protection 6-2 is formed, is completed bonding and cover 3 exposed parts of lid socket steel ring 4 and bellmouth steel loop, room temperature moisture-keeping maintaining at least 7 days.

Claims (5)

1. a kind of long life anti corrosion lined Prestressed concrete cylinder pipe, it is characterised in that：Lined pre-stress steel cylinder coagulation On the outside of native pipe body and Pipe installing is followed by the exposed parts of cephalic groove channel-section steel material, including steel cylinder（1）, compressor wire（2）, hold Mouth steel loop（3）And socket steel ring（4）On be covered each by factory make ultra-high performance concrete external protection（5）And field fabrication The inside and outside protective layer of ultra-high performance concrete（6-1、6-2）；The concrete lining of pipe（7）The super of factory's making is coated with inwall High performance concrete inner protective layer（9）.

2. long life anti corrosion lined Prestressed concrete cylinder pipe according to claim 1, it is characterised in that：In steel cylinder （1）And compressor wire（2）The factory in outside makes ultra-high performance concrete external protection（5）Thickness is 20～50mm.

3. long life anti corrosion lined Prestressed concrete cylinder pipe according to claim 1, it is characterised in that：In pipe Concrete lining（7）The factory of inwall makes ultra-high performance concrete inner protective layer（9）Thickness is 15～30mm.

4. long life anti corrosion lined Prestressed concrete cylinder pipe according to claim 1, it is characterised in that：In pipeline Joint internal channel fills field fabrication ultra-high performance concrete inner protective layer（6-1）, bellmouth steel loop（3）And socket steel ring（4）Outward On dew part, bonding is coated with field fabrication ultra-high performance concrete inner protective layer（6-1）.

5. long life anti corrosion lined Prestressed concrete cylinder pipe according to claim 1, it is characterised in that：In pipeline Joint outer channel is irrigated and fills field fabrication ultra-high performance concrete external protection（6-2）, socket steel ring（4）With bellmouth steel loop （3）On exposed parts, bonding is coated with field fabrication ultra-high performance concrete external protection（6-2）.